A listing takes time and the exchange/regulators have to do proper diligence. This delay is not unusual. Do people know how long it takes to list a company? GWM was faster because of the Norther american assets. Dealing with Columbian assets is more complex. It helps that GWY was listed but the regulators have to protect market participants (i.e. potential new investors).
I am not surprised by the time this is taking and do not beleive their are serious take over talks (regarding GLW) that is delaying listing. I am sure management is anxious to get this listed as anyone else. I would think we are pretty close to listing now. Got to laugh at the conspiracy theories. GWY said it would take longer to list as the exchange/regulators told them so. Take them at their word.